通讯机构：
[Jiang-xia Li] S;School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha, China<&wdkj&>Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha, China
会议名称：
11th International Conference on Asian and Pacific Coasts (APAC)
会议时间：
NOV 14-17, 2023
会议地点：
Kyoto, JAPAN
会议主办单位：
[Yao, Yu;Wu, Ji;Li, Jiang-xia;Chen, Long] Changsha Univ Sci & Technol, Sch Hydraul & Environm Engn, Changsha 410114, Peoples R China.^[Yao, Yu;Li, Jiang-xia;Chen, Long] Key Lab Water Sediment Sci & Water Disaster Preven, Changsha 410114, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Data analysis and mathematical statistics are used to analyze the Interannual variation of runoff and precipitation in the Jinsha River basin from 1961 to 2015. The area average annual precipitation showed no significant upward trend, and the annual runoff showed no significant downward trend. The results of cumulative anomaly test, MK mutation test and sliding t test are consistent, there were three mutation years of 1984, 1997 and 2005 in the time series of annual precipitation and runoff in the Jinsha River basin. This study also provides necessary hydrometeorological basic information for quantitative assessment of the contribution rate of climate change and human activities to runoff change.
作者：
Yu, G. L.*;Yan, X. J.;Chen, H.;Du, C. Y.;Fu, Y. J.;...
作者机构：
[Yu, G. L.; Fu, Y. J.; Yan, X. J.; Chen, H.; Du, C. Y.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha, Hunan, Peoples R China.;[Yu, G. L.; Fu, Y. J.; Yan, X. J.; Chen, H.; Du, C. Y.] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha, Hunan, Peoples R China.;[Zhang, J. X.] Changjun High Sch, Changsha, Hunan, Peoples R China.
会议名称：
International Conference on Civil, Architecture and Environmental Engineering (ICCAE)
会议时间：
NOV 04-06, 2016
会议地点：
Taipei, TAIWAN
会议主办单位：
[Yu, G. L.;Yan, X. J.;Chen, H.;Du, C. Y.;Fu, Y. J.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha, Hunan, Peoples R China.^[Yu, G. L.;Yan, X. J.;Chen, H.;Du, C. Y.;Fu, Y. J.] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha, Hunan, Peoples R China.^[Zhang, J. X.] Changjun High Sch, Changsha, Hunan, Peoples R China.
会议论文集名称：
Proceedings of The 2016 International Conference on Civil, Architecture and Environmental Engineering（Vol.1）
摘要：
Biological Aerated Filters (BAFs) are a promising biological oxidation technology for wastewater treatment and reuse. The characteristics of packing media in BAFs considerably affect the removal of pollutants. This study aims to compare and investigate the pollutant removal performance of two identical bench-scale BAFs, BTF 1 and BTF 2, to evaluate the feasibility of employing polyurethane sponge as BAF media. BTF 1 and BTF 2 were packed with polyurethane sponges and ceramic particles, respectively, and evaluated for COD and NH4+-N removal at various hydraulic loadings. When the hydraulic loading was varied from 5 L/h to 20 L/h, the overall COD removal efficiencies of BAF 1 and BAF 2 reached 82.8% and 78.5%, respectively. BAF 1 performed better in COD removal than did BAF 2 under low hydraulic loadings of 5 and 10 L/h. The removal efficiency for COD and NH4+-N rose with increasing media height in both BAF systems. The majority of COD and NH4+-N removal occurred within a media height of 0.4 m. The BAF 1 system exhibited a higher and steadier treatment performance for COD and NH4+-N removal because of the large specific surface area and high porosity rate of the polyurethane sponges. These results indicate that polyurethane sponges have potential as media in BAFs.
摘要：
Seawall is a most commonly used structure in coastal areas to protect the landscape and coastal facilities. The studies of interactions between the tsunami-like solitary waves and the seawalls are relatively rare in the literature. In this study, a three-dimensional numerical model based on OpenFOAM® was developed to investigate the tsunami-like solitary waves propagating over a rectangular seawall. The Navier–Stokes equations for two-phase incompressible flow, combining with methods of k−ε for turbulence closure and Volume of Fluid (VOF) for tracking the free surface, were solved. Laboratory experiments were performed to measure some of the hydrodynamic feature associated with solitary waves. The model was then validated by the laboratory data, and good agreements were found for free surface, velocity and dynamic pressure around the seawall. Finally, a series of numerical experiments were conducted to analyze the evolution of both wave and flow fields, the overtopping discharge as well as wave pressure (force) around the seawall, special attention is given to the effects of seawall crest width. Our findings will help to improve the understanding in the occurrences of tsunami-induced damages in the vicinity of seawall such as wave impact and local scouring.
作者机构：
[Wang, Z. L.; Zhang, C. D.] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing, Peoples R China.;[Li, Z.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha, Hunan, Peoples R China.
会议名称：
13th International Symposium on River Sedimentation (ISRS)
会议时间：
SEP 19-22, 2016
会议地点：
Stuttgart, GERMANY
会议主办单位：
[Zhang, C. D.;Wang, Z. L.] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing, Peoples R China.^[Li, Z.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha, Hunan, Peoples R China.
摘要：
Step-pool system is one of the most important and widespread bed structures in mountain rivers and its failure mechanism plays a significant role on the stability and fluvial process of mountain river bed. Combined with the effects of water discharge, downstream scour of the step, surrounding grains, and grain impact, the forces acting on the keystone of a step-pool were schemed and analyzed to advance a physically-based theoretical model for individual step-pool stability. The model illustrates that the channel slope, scour angle, keystone diameter, discharge, impact grain size and interlocking effect are the key factors influencing the stability. With the increase of the scour angle, the critical discharge for keystone destabilization decreases even to a value over 6 times smaller when the scour angle reaches 60 degree. Large floods may break the step when the discharge surpasses the critical value lowered by downstream scour. Grain impact can further decrease the critical discharge for step-pool failure and such effect would be enhanced with increased size, initial velocity and scour angle. Large grains supplied by floods with long return time, debris flows or landslides can even dislodge the keystone directly. The model was applied to step-pool reaches and could evaluate step-pool stability precisely.
会议名称：
Water and Environmental Sustainability Symposium
会议时间：
OCT 20, 2015
会议地点：
Tsinghua Univ, Beijing, PEOPLES R CHINA
会议主办单位：
Tsinghua Univ
关键词：
macroinvertebrates;aquatic ecology;hydrological connectivity;Ruoergai Wetland;Yellow River source
摘要：
The Ruoergai (Zoige) Wetland, the largest plateau peatland in the world, is located in the Yellow River source region. The discharge of the Yellow River increases greatly after flowing through the Ruoergai Wetland. The aquatic ecosystem of the Ruoergai Wetland is crucial to the whole Yellow River basin. The Ruoergai wetland has three main kinds of water bodies: rivers, oxbow lakes, and marsh wetlands. In this study, macroinvertebrates were used as indicators to assess the aquatic ecological status because their assemblage structures indicate long-term changes in environments with high sensitivity. Field investigations were conducted in July, 2012 and in July, 2013. A total of 72 taxa of macroinvertebrates belonging to 35 families and 67 genera were sampled and identified. Insecta was the dominant group in the Ruoergai Basin. The alpha diversity of macroinvertebrates at any single sampling site was low, while the alpha diversity on a basin-wide scale was much higher. Macroinvertebrate assemblages in rivers, oxbow lakes, and marsh wetlands differ markedly. Hydrological connectivity was a primary factor causing the variance of the bio-community. The river channels had the highest alpha diversity of macroinvertebrates, followed by marsh wetlands and oxbow lakes. The density and biomass of Gastropoda, collector filterers, and scrapers increased from rivers to oxbow lakes and then to marsh wetlands. The river ecology was particular in the Ruoergai Wetland with the high beta diversity of macroinvertebrates, the low alpha diversity of macroinvertebrates, and the low taxa richness, density, and biomass of EPT (Ephemeroptera, Plecoptera, Trichoptera). To maintain high alpha diversity of macroinvertebrates in the Ruoergai Wetland, moderate connectivity of oxbow lakes and marsh wetlands with rivers and measures to control headwater erosion are both crucial.
摘要：
Dam safety surveillance model in Switzerland is a classic example of good combination of traditional way and modern concept. There is no dam failure in history of Switzerland. Swiss dam safety surveillance mode is highly praised by International Commission on Large Dams and is of enlightening and reference significance to the safety management of reservoir dams in China. Based on introducing the basic information of dams in Switzerland and safety surveillance concept, this paper systematically analyzes the safety surveillance mode of dams in Switzerland, digs the safety surveillance characteristics of dams in Switzerland. Through contrastive analysis of the dam safety management modes in China and Switzerland, building safety culture, defining management responsibilities, enhancing surveillance and inspection, making innovative management mode, attaching importance to emptying requirements, perfecting metal structure testing system and a series of experience in Switzerland are put forward for China's reference.
作者机构：
[Tang, H. S.; Agrawal, A.; Qu, K.] CUNY City Coll, Dept Civil Engn, New York, NY 10031 USA.;[Deng, B.; Tang, H. S.; Jiang, C. B.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Tang, H. S.] C;CUNY City Coll, Dept Civil Engn, New York, NY 10031 USA.;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.
会议名称：
2nd Conference of Global Chinese Scholars on Hydrodynamics (CCSH '2016)
会议时间：
NOV 11-14, 2016
会议地点：
Wuxi, PEOPLES R CHINA
会议主办单位：
[Qu, K.;Tang, H. S.;Agrawal, A.] CUNY City Coll, Dept Civil Engn, New York, NY 10031 USA.^[Tang, H. S.;Jiang, C. B.;Deng, B.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha, Hunan, Peoples R China.
关键词：
coastal ocean flow;multiscale;multiphysics;hybrid method;domain decomposition;SIFOM-FVCOM system
摘要：
This paper evaluates the SIFOM-FVCOM system recently developed by the authors to simulate multiphysics coastal ocean flow phenomena, especially those at small scales. First, its formulation for buoyancy is examined with regard to solution accu- racy and computational efficiency. Then, the system is used to track particles in circulations in the Jamaica Bay, demonstrating that large-scale patterns of trajectories of fluid particles are sensitive to small-scales flows from which they are released. Finally, a simulation is presented to illustrate the SIFOM-FVCOM system's capability, which is beyond the reach of other existing models, to directly and simultaneously model large-scale storm surges as well as small-scale flow structures around bridge piers within the Hudson River during the Hurricane Sandy.
会议名称：
35th ASME International Conference on Ocean, Offshore and Arctic Engineering
会议时间：
JUN 19-24, 2016
会议地点：
Busan, SOUTH KOREA
会议主办单位：
[Wang, Jiadong;He, Guanghua;Zhang, Dehe] Harbin Inst Technol, Sch Naval Architecture & Ocean Engn, Weihai 264209, Shandong, Peoples R China.^[He, Guanghua] Second Inst Oceanog, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China.^[He, Guanghua] Changsha Univ Sci & Technol, Key Lab Water & Sediment Sci & Water Hazard Preve, Changsha 410114, Hunan, Peoples R China.
摘要：
A numerical wave tank that specialized to Navier-Stokes equation was established by a CIP (Constrained Interpolation Profile) method in present study. The numerical model is used to simulate the strongly nonlinear interaction between the solitary wave and a horizontal two-dimensional plate. Most of all, hydrodynamic forces acting on the plate due to solitary wave are investigated in both submerged cases and elevated cases. Sufficient numerical simulations with parameters varied, including different water depths, submergence depths, elevations above the still water level and wave amplitudes are carried out. The time series for hydrodynamic forces and the extremum of horizontal and vertical force are presented in this paper for some significant conclusions. The numerical results are compared with experimental data is in good agreement.
期刊：
IOP Conference Series: Earth and Environmental Science,2016年39(1) ISSN：1755-1307
通讯作者：
Li, Y. F.
作者机构：
[Li, Y. F.] Nanjing Hydraul Res Inst, Nanjing 210029, Jiangsu, Peoples R China.;[Li, Z. W.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410004, Hunan, Peoples R China.;[Jia, Y. H.] East China Normal Univ, Shanghai 200052, Peoples R China.;[Zhang, K.] Minist Water Resources, Key Lab Pearl River Estuarine Dynam & Associated, Guangzhou 510611, Guangdong, Peoples R China.
通讯机构：
[Li, Y. F.] N;Nanjing Hydraul Res Inst, Nanjing 210029, Jiangsu, Peoples R China.
会议名称：
2nd International Conference on Water Resource and Environment (WRE)
会议时间：
JUL 23-26, 2016
会议地点：
Shanghai, PEOPLES R CHINA
会议主办单位：
[Li, Y. F.] Nanjing Hydraul Res Inst, Nanjing 210029, Jiangsu, Peoples R China.^[Li, Z. W.] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410004, Hunan, Peoples R China.^[Jia, Y. H.] East China Normal Univ, Shanghai 200052, Peoples R China.^[Zhang, K.] Minist Water Resources, Key Lab Pearl River Estuarine Dynam & Associated, Guangzhou 510611, Guangdong, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Extensive studies have been carried out to study the performance of mangrove forests in wave height reduction. In this study, the reduction of the inundation and run-up of leading tsunami waves by mangrove forests was investigated through a series of laboratory experiments conducted in a long wave tank. The inundation and run-up were measured using a high speed CCD camera. Solitary waves were used to model the leading tsunami waves. Five vegetation models representing three forest densities and two tree distributions were examined on an impermeable sloping beach, and they were compared with the non-vegetated slope in view of wave reflection, transmission, and run-up. Results show that both incident wave height and run-up could be reduced by up to 50% when the vegetation was present on the slope. Dense vegetation reduced the wave transmission because of the increased wave reflection and energy dissipation into turbulence in vegetation. Normalized wave run-up on the beach decreased with the increase of both normalized incident wave height and forest density. Effect of forest density on the wave run-up on the sloping beach was further examined, and an empirical formula with the density incorporated was proposed. The study also highlighted the importance of tree distribution to wave interaction with vegetation on the slope when the forest density was unaltered, and run-up reduction difference between tandem and staggered arrangements of the trees could reach up to 20%.
摘要：
In this study, the input data for model simulation are collected through internet and field investigation: DEM data, landuse map, soil class map and weather data. The spatial database for runoff simulation and physical attribute database are also created. A distributed hydrological model - SWAT (Soil and Water Assessment Tool), developed by USDA ARS (Agricultural Research service), has been applied to simulate the runoff process in the Lianshui Basin, China. To make the SWAT become applicable in the study area, the experimental modification of SWAT model is also performed by replacing surface runoff module with Xin'anjiang model. This research indicates that SWAT and modified model are reasonable in simulating the monthly average runoff. The simulated values with modified model are more accurate and closer to measured data than the result from the original SWAT.
摘要：
The critical gap ratio of local scour around pipeline and variations of bed form in the action of oblique flow was studied by flume experiments. A tube was chosen as a simplification submarine pipeline in the experiment. A high accuracy instrument ADV was used to measure the parameters of the flow field and a topographic meter was used to measure the terrain. The incident directions of the flow were 30 degrees, 45 degrees, 60 degrees and 90 degrees, with 0 degrees representing flow parallel to the axis of the pipeline and 90 degrees representing flow perpendicular to the axis of the pipeline. The results showed that the form of sand ripples behind pipeline can be divided into transverse and longitudinal forms which were under the action of oblique flow. With the angle a between flow and pipeline was the smaller, longitudinal sand ripples become more obvious. There was only formed horizontal sand ripple while the angle alpha = 90 degrees and when a = 30 degrees, it had hardly any horizontal sand ripple. The critical gap ratio of the local scour G = e/D increased as the angle alpha (0 degrees-90 degrees) increasing. At the same velocity and gap ratio, with the angle was the greater, the local scour of the pipeline become more obvious.
摘要：
The paper has studied the degradation effect of the polyvinyl alcohol in the Ozone catalytic oxidation oxygenated water, include three kind of catalyst of Fe2+, Mn2+, Cu2+. The results as below, the degradation effect of the polyvinyl alcohol by Ozone catalytic oxidation is higher than ozone alone obviously, and it is related with the concentration of catalyst, the degradation effect will increase with the increase of concentration of Fe2+, and to the maximum value, the degradation is 85%; it will decrease with the increase of concentration of Mn2+, the optimum content is about 5mg/L, the degradation rate is 85%; when Cu2+ is added, the degradation rate is 53% in 35mg/L, and the degradation of other contents is not obvious. When the content of three kinds of catalyst are all 35mg/L and the reaction time is 3h, the sort of degradation effect is Fe2+>Cu2+>Mn2+.
会议名称：
3rd International Conference on Green Building, Materials and Civil Engineering (GBMCE 2013)
会议时间：
AUG 21-23, 2013
会议地点：
Taiwan, PEOPLES R CHINA
会议主办单位：
[Wu Fangtong;Guo Juan;Lei Yanni] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.^[Zhu Hongyu] Hunan Juntai Engn Co Ltd, Changsha 410007, Peoples R China.
会议论文集名称：
Applied Mechanics and Materials
关键词：
Heavy metal;Pollution evaluation;Sediment;Xiangjiang River
摘要：
In order to assess polluting condition of heavy metals in sediment of the Xiangjiang River Changsha section, the spatial distribution of four heavy metals were determined in river sediments at six sampling stations. Geo-accumulation Index of heavy metals in superficial sediment of the Xiangjiang River Changsha section was in the decreasing order of Cd>Zn>Pb>Cu. On the whole, the pollution level was moderate-high, and the order of four heavy metals pollution lever was noted in the sequence of Liuyang River entrance of Xiangjiang> Juzizhou Bridge >Houzishi Bridge> the Second Xiangjiang River Bridge > Xiangjiang Super Bridge > Xiangjiang Sanchaji Bridge. The Potential Ecological Risk Evaluation showed that heavy metals ecological risk in sediment of the Xiangjiang River Changsha section was very high, Cd was the primary contribution element, followed by Pb.
